Change-speed gear



H. C. BLANC-GARIN.

CHANGE SPEED GEAR.

APPLICATION FILED MAR.7,1919.

1,405,39 1, Patented Feb. 7, 1922.

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H. "C. BLANC-GAR IN.

CHANGE SPEED GEAR.

APPLICATION un MAR. r, 1919 ,4 5,39 Patented Feb. 7, 1922.

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H. C. BLANC-GARIN.

CHANGE SPEED GEAR.

APPLICATION FILED MAR. 7. 1919.

. 1,405,391., Patented Fb. 7, 1922.

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H. C- BLANC-GARIN.

CHANGE SPEED GEAR- APPLICATION mzo MAR- 7.- 1919, 1 Patented Feb. 7, 1922.

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H. c. BLANC-GAR IN CHANGE SPEED GEAR.

APPLICATION FILED MAR-7,1919.

1,405,391. PatentedFeb. 7, 1922.

H SHEETS-SHEET 5- w ifii mzm per Atimey.

H. C. BLANC-GARIN.

CHANGE SPEED GEAR.

APPLICATION men MAR. 1. 1919.

1,405,391, Patented Feb. 7, 1922.

H SHEETS-SHEET 6.

4 Attorney,

H. C. BLANC-GARIN.

CHANGE SPEED GEAR.

APPLICATION FILED MAR. 7. 1919.

1 405 391 I Patented Feb. 7, 1922.

- ll $HEETSSHEE\T31.

Attorney.

H. c. BLANC-GARIN.

CHANGE SPEED GEAR.

APPLICATION FILED MAR. 7, 1919.

1,405,391. Patented Feb. 7, 1922.

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H. C. BLANC-GARIN.

CHANGE SPEED GEAR.

, APPLICATION FILED MAR. 1, 1919. 1,405,391 Patented Feb. 7, 1922.

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per/7 AHWT.

H. C. BLANC-GARIN.

CHANGE SPEED GEAR. APPLlCATlON FILED MAR. 1. 1919.

Patented Feb. 7, 1922. 11 SHEETS-SHEET 10.

Attorney;

H. C. BLANC-GARIN.

CHANGE SPEED GEAR.

APPLICATION HLED MAR. 7. 1919.

1945,3931 Patented Feb. 7, 1922.

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INVENTOR HENRI com/m BLHNC-G/JR/N.

5) 05, ATTORNE Y.

UNITED stare-s annex CONRAD rains-Gianni, or LEvALLoIs-PERRnT, FRANCE.

CHANGE-SPEED GEAR.

Specification ofjIletters Patent.

Application filed March 7, 1919. Serial No. 281.194.

(GRANTED UNDER THE rnovrsxons or ran ACT or nAncns, 1921, 41STAT. 1.; 1313.

To all whom it ma concern:

Be it known that HENRI CONRAD BLANC- GARIN, of 52 Rue Danton, Levallois-Perret, Seine,France,have'invented a Change-Speed Gear, (for which I have filed application in France, Feb. 20, 1918, Patent No. 516,360,) of which the following is a full, clear, and

exact description.

The present invention relates to achange speed gearing for automobile mechanism in' general, but also applicable in all cases where it is a question of reducing at will the .speed of a driving shaft, obtaining reduced speed backwards and finally giving the :driven shaft a speed equal to that of the driving shaft.

This change-speed gear is characterized by the special combinationof a reversing group of epicyclio reducing gear wheels mounted on the driving shaftwith an epicyclic rectifying group mounted on' the driven shaft, the epicyclic pinions being respectively mounted on the disc fixed to the shaft of the group.

The reducing group reverses the motion Y of the driving shaft, while the other group restores the direction of working.

The apparatus is worked by fixing or looking one or other of the pinions of one of the two groups by means of any suitable'device, such as a brake band for example, in such a way as to transmit the motion to the driven shaft.

In practice it results from this system that the excessive speed of certain gears, which is common in the systemsusually employed, whether in use or iuiclutched, is eliminated, and also that the noise and the premature wear resulting from this excessive speed are also eliminated.

This advantage is particularlyimportant I when it is a questionof obtaining speeds already been concerned in'obtaining other speeds.

(2) The possibility of obtaining for the driven shaft a speed equal to that of the Figures 1 and 1 laid sideby side, show a longitudinal sectional elevation of a .0011- structional form of this invention, on the line XX in Figure 3. f

Patented Feb 7, 1922.

f m a y fdriving shaft without the additionof a flex- I Figures 2 and 2 similarly show aflongitudinal sectional elevation ofthe' same apparatus, on the line Y'-Y' in Figure 3.

Figure 3 is a cross section of the apparatus, on the line Z- Z in Figure 1 Figure 4 is a cross section ofthe appa-- ratus, on the line W-W in Figure 1.

Figures 5 and 5 laid side by side, show cross sections through :the various pinions of the reducing reversing group, corresponding with Figures 1 to e of thedrawing- Figures6 and 6 similarly show cross sec tions through the various pinions in agreement with the rectifying group, corresponding to'Figures 1 to 4 of the drawing.

Figure 7 shows diagrammatically the gears in operation for the third speed .(permitting of direct drive). 7 r

Figure8 shows the gears in-operation. for the second speed. 7

Figure'9 shows the gears in operation for the first speed.

Figure 10 showsthe gears in operation for working backwards. v V

Figure 11 is a diagrammatic view showing the means'of obtaining very wide. differences ofspeed in changespeed gear of this type.

Figure 12 is a detail view'partly insecti.on''showing means for operating pawl or clutch devices.

Figure 13 is a detail sectional viewshowing means for the mounting of intermediate pinions. c

The apparatus which forms. the subject matter of .the present inventiom and which is shown in the accompaning drawing, comprises a driving shaft A and a. driven shaft B.

On the same side as the driving shaft A is located the reducing reversing group A (Fig. 1

On the same side as the driven shaft B there is the rectifying group B (Fig. 1.) p A disc A forming part of the reducing group A is fixed to the driving shaft A.

Another disc B forming part of the rectifying group B is fixed to the driven shaft B.

The disc A is provided with threepairs of epicyclic pinions a, a a (6'', a and a (Figs. 5, 5 the members of each pair being virtually integral with each other.

The disc B is provided with three pairs of epicyclic pinions Z), 6 b b 19* and 6 (Figs. 6, 6 the members of each pair being virtually integral with each other.

The pair of epicyclic pinions a, a of t e disc A is connected by'means of the pinion a with a pinion 0 virtually integral. with a drum 0 for forward travel, provided with a ratchet d, and by means of the pinion a witha pinion e, virtually integral with sleeve 6 connecting the reducing reversing group A with the rectifying group B The pair of epicyclic pinions a a? is connected by means of the pinion c with pinion f virtually integral with the drum 7' for backward working, provided with the brake band 7, and by means of the pinion a with a pinion a, virtually integral with the sleeve 6 forming part of the reducing group A The pair of epicyclie pinions 01 a is connected by means of the pinion 0. with a pinion g virtually integral with a drum 9 for forward working, provided with a brake band it.

Each pair of epicyclic pinions is therefore connected by means of one of its pinions with the pinion. e, the said epicyclie pinions being (1 (t and a.

The pair of epicyclic pinions 7'), o of the disc B is connected by means of the pinion Z) with the pinion c and by means of the pinion b 'with a pinion 71: virtually integral with a drum Z0 provided with a brake band Z.

The pair of epicyclic pinions "0 6 is connected by means of the pinion b with the pinion 6 coming from the reducing group and by means of the pinion b with a pinion m virtually integral with a drum m prowith the brake band j.

vided with a brake band a.

The pair of epicyclic pinions b, b is con-' nected by means of the pinion b with the pinion e of the reducing group and by means of the pinion b with the pinion 2', virtually integral with the drum 2' provided Each pair of pinions is therefore connected by means of one of its pinions with the pinion e, the said epicyclic pinions being 6,71 6

By way of example the numbers of teeth in the various pinions may be as follows The numbers of teeth in the various pinions engaging therewith may be as fol- .EOWSI V V Rectifying'group.

Reducing reversing group.

Z jg} =45 teeth g jg =45 teeth tith 5:22 9 it} =45 teeth 3 g F teeth Ziig =45 teeth =45 t h 53;} teeth Zijg =45 teeth 2 :52} :45 teeth =45 teeth The various reductions are obtained in the following manner Gn referring to Figure 9 of the accompanying drawing it will be seen, for ex ample, that at the first speed, that is to say the lowest speed, if we make the pinion g stationary in the reducing group A we obtain, about this pinion, the rotation of the epicyclic pinion a driven by the driving disc A and the rotation through an equal angle of the epicyclic pinion a which is virtually integral with the epicyclic pinion M, which has the result of bringing about the rotation, in the opposite direction, of the pinion c.

This speed of the pinion 6, reduced and reversed from the driving shaft A, is taken up by the rectifier B by means of the epicyrlic pinion 5 mounted on the disc B of the rectifier and gearing; with the reversing pinion e The epicyclic pinion b is virtually intewith the pinion 79 to which it communicates the said reversed velocity, still further reducd by the ratio of the gears'e and I): the pinion which isin gear with the pinion m, communicates this velocity to the 7 At the second speed,.Figure 8, the speed of the pinion 6, reduced and reversed from the driving shaft A, is taken up by the rectifier by means of the epicyclic pinion Z) mounted on the disc 13 and gearing with the reversing pinion a ,The epicyclic pinion b is virtually integral with the pinion 6 to which it communicates the said reversed velocity still further reduced by the ratio of the gears e and b; the pinion b i n gear with the pinion In, communicates this speed .to the latter. 7

By fixing the pinion 79, we obtain, about the latter, 'the rotation of the epicyclic pinion 6 and. consequently, that of the disc B of the driven shaft, under the action of the ,pinion e acting on the eplcyclic pinion b, virtually integral with the pinion b.

For the third speed, as indicated by Figure"7 the speed of the pinon 6, reduced and reversed from the driying shaft A, is taken up by therectifier by means of the epicyclic pin on 1 m un d qu t disc 3 and g jing with the reversing'pinion 6 The epicyclic pinion b is virtually integral with ,the pinion If, to which it communicates the said reversed velocity, re-

, duced still further by the ratio of the gears i e? and b5; thefpinion t in gear with the 30...

latter.

pinion communicates this speed to the By looking the pinion i we obtain, about the"latter,.the rotation of the epicyclic pinion bt, and consequently that of thedisc B of thedriven shaft under the action of the pinion e acting on the epicyclic pinion 6 ,which is virtually integral with the pinion b For reversed working, asshown in Figure \10 of the drawing, the locking, in the reducing group A of the pinion 7, brings about therotation ofthe pinion a under the action of theidriving disc A which this time has the ,result of driving, through the mediumof thepinion a at a greatly reduced speed, the pinion e, in the same direction as the drivingshaft A, and in this way of reversin the working of the disc B which is Virtualy integral the driven shaft B, whatever gears may be in operation in the rectifying group.

Forthe reduction ofspeed while running forwards, it will be seen, Figure 11, that by locking the ratchet drulnc (see Figures 5, 5 which is .virtually integral with the pinion 0 in gear with the pinion a, the ratios of the gears a and a substituted for the gears a and 9 have the result of reducing the speeds that have been indicated above, which makes a new range of speeds available in the rectifier.

For direct driving it will be seen, by examining the diagrammatic Figure 7, (third speed), that all the gears in the reducing and reversing group have their diametral a to a concordance with the gears in the rectifying group; it follows therefore that at this speed the disc B and consequently the driven shaft are rotating at 'a speed equal to that of the disc A which is virtually integral with theqdriving shaft. If for example at this moment pawls or clutches 0 (see'Figuresl,

1 and 3), arranged concentricallyfon'the driving-disc A are-liberated by means of a suitable-device (see Fig. 12) virtually intc 'gral with the gear casing, alocking willbe obtained. which renders the driving shaft A virtually integral with the driven shaft B The locking of the drums g and'i is then superfluous 'andilthe' liberation thereof per-- mits the change-speed gear asa wholegto romm at the speed of .thedri ving shaft in its bearings p, which are virtually integral with silient clutch. i

1 In Figure 11 of the-drawing a means has been indicated for obtaining very wide difthe gearcasing, without the use of-any references of speed between the two shafts in change-speed gearing of this system Th s difference 1SJ1I1 accordance :Wltll I the m24t"teeth; now for one turn ofthedriving shaft A car ying the .planetaryrgroup xa gisxsoji The absolute angular velocity of the driven pinion e isequal to 1 X (1-+ 1.33 0:33 or. of a revolution in a'direction opposite to the direction of A. For the driving pinion e are the following values: Y

1 equal to rection as A. It will thus be seen that the speed reduction is 1:4 and that the direction of rotation is the same. This means comprises a group of intermediate pinions w, mounted in the manner indicated at Fig. 13 and placed between the reversing sleeve and the rectifying group. In this case the epicyclic pinions may be mounted The angular velocity of the shaftqBi is lines. Similarly,

'- The forms, details,

either loose on the shafts that carry the epicyclic pinions of the rectifier, or else on independent shafts, as indicated in dotted any intermediate sleeve with the duty of gearings may be the other on the first and restoring it thereto after reduction, thetransmitting and receiving pinions of the first shaft, being of course independent of one another, and being in case of need each mounted on a shaft of'its own.

Claims:

1 v 1. A change speed gear comprising a driving shaft, a driven shaft arranged in alignment with this driving shaft, a reversing shaft the axis of which coincides with that of the two previous shafts, a pmion loosely mounted on the driving shaft, a gear carried by the reversing shaft, a double epigear carried by the cyclic group of gears mounted on the driving shaft and gearing on the one hand with the said loosely mounted pinion and on the other hand with the gear carried by the reversing shaft, means for'locking at will the loosely mounted pinion, a second pinion loosely mounted on the driven shaft, a second gear carried by the reversing shaft, a double epicyclic group of gears carried by the driven shaft.and gearing, on the one hand, with the latter loosely mounted pinion and, on the other hand with the latter reversing shaft, and means for looking at will this latter loosely mounted pinion.

2. A. change speed gear comprising a driving shaft, a driven shaft arranged in alignment with this driving shaft, a reversing shaft the axis of which coincides with that of the two previous shafts, a pinion loosely with the mounted on the driving shaft, a gear whee carried by the reversing shaft, a double epicyclic group of gears carried by the driving shaft and gearing, on the one hand loosely mounted pinion, and on driven shaft, and

reversing shaft, a double epicyclic group of 1 gears carried by the driven shaft and the pinions of which have respectively the same diameters as those of tle double epicyclio group of gears carried by, the driving shaft and are. in gear, on the one hand withthe' second loosely mounted pinion, and on the other hand with the second gear wheel carried -by the reversing shaftfthis second loosely mounted pinion and second gear wheel having respectively the same d1- ameters as the'loosely mounted pinion and gear wheel of the reversing shaft with which gear the double epicyclio group of gears mounted on the driving shaft, means for locking this second loosely mounted pinion gearing with one of the pinions of the double epicyclic groupof gears carriedby the means for directly connectin the driving shaft and the driven shaft. p H I 3. A change speed geargcomprlslng a driving shaft, adriven shaft arranged in al gnment with this driv ng shaft, a reversing shaft the axis 'of which coincides with that. of the two previous shafts, mounted. on the drivingshaft, a gear wheel mounted on the reversing shaft, a double epicyclic group of gears. carried by the driving shaft and gearing, on the one hand a pinion loosely' with'the loosely mounted pinion, and on the other hand with the gear wheelmounted on the reversing shaft, means for locking at will this loosely mounted pinion, a second a second gear wheel carried by the reversing shaft, a double epicyclic group of gears carried by the driven sha and gearing, on the one hand with the second pinion loosely mounted on the driven shaft,

loosely mounted pinion, and on the other hand with the second gear wheel carried by the reversing shaft, and means for look ing atwill this second loosely'mounted pinion. the first mentioned loosely mounted pinion having a diameter smaller than the first mentioned gear wheel on the reversing l shaft.

The foregoing specification of my change speed gear signed by me this seventh day of February 1919.

HENRI CONRAD} BLANC-GARIN. 

